You can now connect Claude to MCP servers directly in the API. Just add a server URL to your API request and Claude handles tool discovery, execution, and error management automatically.
@alexalbert__
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Claude’s Code Execution Tool Enhances Data Analysis and Math Tasks
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The code execution tool allows Claude to run python code that it generates in a secure sandboxed container.
— Alex Albert (@alexalbert__) 22 mai 2025
This is a big boost for any tasks involving data analysis or math. pic.twitter.com/hXRmBvEhFqThe code execution tool allows Claude to run python code that it generates in a secure sandboxed container. This is a big boost for any tasks involving data analysis or math.
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Anthropic API Gets Four Major New Features
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We’ve added four new features to the Anthropic API today:
– Code execution tool
– MCP connector
– Files API
– Extended prompt caching Let’s dive in: -
New Prompting Guide for Transitioning to Latest Models
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On this note, we've published a prompting guide to help transition your prompts to these new models:
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Claude 4’s Impressive Instruction-Following Capabilities
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One of the most surprising things about Claude 4 is how well it follows instructions. Sometimes almost too well. Our web search prompt for Sonnet 3.7 was a mess. We had to repeat the same instructions over and over because the model would randomly ignore things. The prompt kept
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Claude 4 Integration in Copilot Excites Developer Community
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Excited for devs to use Claude 4 in Copilot!
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Cursor models excitement for developer adoption
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Can't wait for folks to use these models in Cursor, I think devs are really going to like them!
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Claude 4 Models Now Available on All Paid Plans and Free Plan
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Both Claude 4 models are available today for all paid plans in claude dot ai. Additionally, Sonnet 4 is available on the free plan. Read more here:
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API Pricing Unchanged for Opus 4 and Sonnet 4
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API pricing remains unchanged 🙂
– Opus 4: $15/$75 per million tokens
– Sonnet 4: $3/$15 per million tokens